Core-maker&#39;s table or the like



March 9 1926.,

G. B. PiCKOP CORE MAKERS TABLE OR THE LIKE Filed August 27 1919 5 Sheets-Sheet 1 March 9 1926..

G. B. PICKOP 5 TABLE OR THE LIKE CORE MAKER Filed Augustb'r, 1919 s Sheets-Sheet 2 March Q 1926. 1,576,458

G. B. PICKOP CORE MAKERS TABLE OR THE LIKE Filed August 27 1919 '3'ShGBtS-Sh69t 5 vwemboz Patented Mar. 9 1926.

UNITED STATES PATEN'I a OFFICE.

GEORGE B. PICKOP, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO THE MALLEABLE mon rrrrmescomranmor BRANFORD, comwacrrcur, a ooaronuxon or" CONNECTICUT.

To an 4.0/1 am it may concern i Be it known .that I, GEORGE B. Pioxor,

a citizen of the United States, residing in the city and county of New Haven, State of Connecticut, have invented certain new ary to produce them by completely fillingwith packed sand so-called core boxes, consisting of mating upper and lower sections,

' usually of cast metal, corresponding interi-- orly in shape to the core which is to be formecl It is customary to fill the core boxes .on tables capable of accommodating a quantity of-the properly conditioned sand. The lower section of the core box being placed on" the table top, such section is heaped up with stand which is properly packed in the same, the top section of the box is then placed on the lower section for obtaining the desired upper contour of the core, the top section is then .lifted off, and

the core-removed from the table, for dry-- ing, while stillyoccupying the lower part of the-box.

Before parting the box sections it has been customary heretofore to, rap or hammer the box with a wooden mallet or like implementin order to obtain a clean removal of the'top' section without any sand adhering to the same and consequently without creating holes or flaws in the upper surface of" the'core caused by particles of the moist f Y sand adhering to the upper box section when the latter is lifted off. The rapping of the core boxes by hand in this manner consumes a considerable part of the time and attention of the operator and is, therefore, objectionable from a production standpoint; and, furthermore, by the direct application of blows to the core boxes the latter are likely to be injured-and to have a short 'life.-

a Vibrating the-boxes preparatory to the part.

Application filed A ugust 27, 1919. Serial No. 320,19.

' cons-mamas TABLE on THE LIKE.

. ing of the sections thereof, which rapping device is operated by power, preferably compressed air, and overcomes the objections above noted.

means readily controlled by the molder or Anotherobject is to provide a table with operator for vibrating work resting upon a the top of the table.

' Another object which I have in view is the provision of, a table suitable for the above and other purposes, having within the confines of its top a part or section which can be readily set in vibration when it is.

desired to bring that about.

Still another object is to furnish a table for coremaking and like purposes having a floating platen with effective means for rapping or vibrating .the same, such platen and the actuating. means therefor being of improved "construction and arrangement.

To. these and other ends the invention consists in the novel features and combinations of parts to be hereinafter described and claimed. 3 In the accompanying drawings: Fig. 1 is a top plan viewof a table embodying my improvgements showing the floating vibratory platen, the. surrounding portion of the table being broken away;

Fig. 1 is a diagrammatic topplan view on a. small scale of the complete table;

Fig. 1 is ,a front elevation on a small scale of the complete'table, this view being also somewhat diagrammatic incharacter; Fig. 2 is a side'elevation of that part of the table shown in Fig.1 on the same scale as Fig. 1

Fig. 3 is an endview of the table part-s shownin Fig. 1; I gig. 4 is a section on .line 4 -4. of Fig. 1; an

Fig. 5 is a section on line 5-5 of Fig. 1. In the embodiment of my invention selected for illustration, I have shown a table 10 (Figs. 1 and 1 which in its general nature is similar to theordinary coremakers table, having a top 10 on which sand may be piled and on which the core box may be filled. The table top is supported by suitable legs 10". In the table top is a suitable opening for a vibratory table section or platen-12 and its surrounding supporting receive the rectangular .metal' frame 11. The platen and its frame are located within the margins of the table top in a convenient position for the workman standing in front of the table, who fills the core box while the latter is .on the platen. The frame 11 may be made of metal and, as shown, it has a horizontally extending portion 13 and avertically extending wall portion 11. The horizontally extending portion 13 rests upon the upper face of the table top around the opening and may be secured in position by screws 15. \Vhile the frame extends slightly above the upper surface of the table, the former and the platen are approximately flush withsuchsurface, the outer edge of the frame being beveled. as shown at 16. The vertical walls 11 of the frame form a boxlike structure in which the platen or section 12 is movably mounted and in the example illustrated the platen is mounted for vertical sliding movement. At the lower ends of the vertical walls 14 horizontal flanges 17 project inwardly for supporting the platen. The latter which has reinforcing ribs 18 on its under surface fits fairly snugly within the supporting frame and the marginal side and end portions of the platen are provided with downwardly extending ribs 18 which are positioned slidably to engage the inner surface of the frame.

The platen is supported in the frame by bolts 19, the upper ends of which are screwed into threaded sockets in the corners of the platen. These bolts are vertically disposed and pass through perforations in the flanges 17. About each of the bolts is coiled a spring 20 interposed between the corresponding flange 17 and the under surface of the platen. Nuts 21, 22 are threaded upon the lower ends of the bolts to provide for vertical adjustment of the platen, which preferably lies normally substantially flush with the upper surface of its inclosing frame. After the nuts 21'have been properly adjusted, they are locked in adjusted position by the lock nuts 22.

The lower face of the platen is provided approximately at its centerwitli a down-' wardly projecting lug 23 and to this lug is rigidly secured a pneumatic vibrator 24. The upper end of the vibrator casing is rigidly secured to the lug 23 by a bolt 25 and nut 26. The vibrator 24 may be supplied with compressed air by a flexible hose or tube 27, which leads to a controlling valve 28 located beneath the platen and from the valve 28 the air is conducted to the vibrator by a second flexible hose or tube 29. The air valve 28, which is shown as of the sliding plunger type, is mounted upon one of the downwardly extending end walls 1-1 of the frame 11, for which purpose a bracket 30 is attached, to said wall by lugs 31 and bolts 32. The bracket 30 is provided with a downwardly projecting post 33 through the lower portion of which is a transverse hole in which one of the nipples 28' of the air valve 28 is mounted; A set screw 34 clamps the nipple in this hole so as'to rigidly secure the valve to the bracket. The air valve is controlled by a bell crank lever pivoted on supporting bracket 30 by trunnions 36 on the lever, which trunnions engage hooks 37 on the bracket 30. The downwardly extending portion 38 of the bell crank lever is arrangedv to abut the outer end of the sliding plunger 39 of the air valve while the upper end of lever 35 is adapted to engage the under surface of the platen in such a manner that the air valve may be controlled by depression of the platen. In order that the parts just described may be adjusted so that the valve 28 will be opened to operate the vibrator 21 when the platen 12 is depressed to a predetermined degree in opposition to the springs 20, the upper end of lever makes engagement with the under surface of the platen by means of an adjustable bolt 40 carried 'by the lever, which boltlis threaded in a socket in the lever terminal so that the upper end of the bolt may be engaged by the under surface of the platen. lVhen adjusted the bolt 40 maybe locked in position by a lock nut 41.

The operation-of the device will be more or less obvious from the foregoing descriptron. In makln a core the lower section of a core box is p aced on the platen 12 and filled with sand which is available on the fixed portion of the table top. The upper section of the box is then placed 011 the lower section in the usual manner. Before lifting off the upper box section, the floating platen 12 is set into' vibration by opening the air valve 28. lVith the particular machine illustrated, the air valve may be opened very readily merely by subjecting the platen to a predetermined downward pressure which may be very conveniently done by the hands of the operator. All that it is necessary for the operator to do is to press downwardly on the platen with a little more force than that previously exerted in filling the core box. When the platen is forced downwardly, the L-shaped lever 35 will open the air valve and start the platen to vibrating in an obvious manner, the vibration being continued until the pressure on the platen is removed. In this manner the sections of the core box may be parted without forming holes or flaws in the core due to sand adhering to the box sections. The controlling pressure may be readily applied to' the platen without the operator being required to move his body, and in fact without requiring anything but the slightest manual mo ement of the operator who e hands are adjusted to naturallyin a. position to control the vibration with a minimum of wasted motion.

The coiled springs 20,-should, of course,-

be sufliciently strong tosustain the platen in' its upper position,

flush with -the table top, when it holds the load of the corebox or other work upon the same, and such springs.

should also have a certain amount of additional supporting power so as to prevent thedepression of the platen by the operator when he packs the sand in the core box. By

' providing for the adjustment of the springs the manner herein particularly described,

adapting-it for rectilinear movement in its rame in a vertical direction, various changes in this and other respects may be made-without departing from the broad principles of the'invention as defined in the claims. It is obvious, for example, that means other than those particularly described for cushioning the table and mounting it for floating movement, so that objectionable vibration is not imparted to the main part. of the table top, will suggest themselves to thbse skilled in the art. a

What I claim is: i 1. A vibrating table fhavinga platen,

3 means for yieldingly supporting the platen,

a normally inoperative vibrator adapted to vibrate said platen, and means for setting the vibrator in operation automatically by a predetermined amount ofdownward pressure exerted on the platen.

2. A vibrating table provided with a. vertically movable platen, means for yieldingly supporting said platen, a normally inolperative vibrator adapted to vibrate said p aten,

and means controlled by said platen for set ting the vibrator in operation.

3. A vibrating table providedwith a vertically movable platen, means for yieldingly, supporting said platen, a normally inoperative vibrator adapted to vibrate said platen,

and means controlled by the pressure exertedinv a. downward direction upon said platen for setting the vibrator in operation. 4, A coremakers bench or table having a top comprising a fixed portion for holding the working materials and a vibratory portion cushioned against downward movement on which the core is formed,

5'. A device of the character described comprising a table, a platen movably mounted in the top (if the table, a normally inoperative vibrator connected to the platen, and

' the .center of the thesame su limiting the upward movement imparted to means whereby 6. A coremakers bench or table having a fixed-top section to terials and avibratory section or laten at least partially; surrounded by'the ed' section and on which the core box is filled and rapped.

7 A vibrating table provided with a relatively movable platen, a normally inoperative vibrator adapted to vibrate said platen,

a movement of the platen will set said vibrator into operation.

receive the Working ma-.'

a valve for controlling the operation of said vibrator and means for controlling. said valve by the movement of said platen.

8. A vibrating table provided with a .relaa valve for controlling the operation of said vibrator, and. adjustable means for controlling said valve by the movement of said platen.

9. A vibrating table, a platen slidably mounted in the top of said table, meansfor yieldingly supporting said platen, a normally inoperative vibrator adapted to -v1- brate said platen, a valve for controlling the .tively movable platen, a normally inoperative vibrator adapted to vibrate said platen,

operation of 'said vibrator, a lever operated by said platen to control said valve, and adj ustable means for varying the position said platen must assume to operate said valve.

10. A vibrating table having a platen movably mounted in the top of the same, a

said vibrator, said platenupon said frame, 4

and meansflcontrolled by' the movement of said platen vibrator.

. 12. In a device of fixedtable, top of said table, said platen having a lug formed upon its lower face at approximately platen,-and a vibrator secured to said lug to vibrate the platen.

for starting and stopping said" the class described, a' a platen slidably mounted in the 135A vibrating tablehaving aplaten slid-g ably mounted within the top of the same, said platen provided with yielding means for normall supporting the upper face of stantiallygflush with the upper face of said table, said platenconstructed to be depressed-within said table, and a vibrator operatively securedto said platen.

ably mounted withinthe same, depressible within said table, yielding means for normally urging-said platen upwardly to its raised position, adjustable meansv for 14. A vibrating table having a platen 'slid-.

said platen said table by said yielding means, and a vibrator operatively secured to said platen.

15. In combination a coremakers bench having a table provided with an opening in its top, a hollow frame mounted therein, a platen mounted to slide vertically within and supported by said frame, and a vibrator for vibrating said platen.

16. A coremaker's bench having a fixed top and a floating platen mounted in the top thereof. and means for vibrating the platen.

1T. coremakens bench or the like having a lixed table section, and a floating platen substantially flush with said table section within the margins thereof.

18. X coremakens bench or the. like having a fixed table section, a spring supported platen at least partially surrounded by said fixed table section, .and means for vibrating the platen independently of the fixed table section.

19. A coremakers bench or the like having a fixed table section, a platen at least partiallysurrounded by said fixed table section and having its upper surface approximately flush with that of said fixed section,

iind means for vibrating the platen independently of the fixed table section compris- -.ing a rapping device directly connected to the plaiteii at the underside thereof.

20. A coremakers bench or the like having a fixed table section. a movable table sectioh supported so as to be'sub stantially flush with said fixed section, means for cushioning .saidmovable. section v against downward movement. and a fluid actuated vibrating device directly connected to said movable section at the under surface thereof.

21. A coremakers-bench or the like having a fixed table section, a movably mounted section, means for Cushioning the movable section, and a pneumatic vibrator attached to said movable section at the tinder surface thereof, the longitudinal axis of said vibrator being disposed in the line of movement of said movable section.

22. A coremakers bench or the like having a fixed table section for holding the working materials, a platen substantially flush With the upper surface of the fixed table section and at least partially surrounded by the latter, resilient means for yieldingly maintaining the movable section in the Hush position, and means for setting the movable section in vibration comprising a pneumatic vibrator attached directly to the movable section and having a suitable controlling valve.

23. A coremakers bench or the like having a movably mounted platen, and means for setting said platen in vibration by a movement thereof of predetermined amplitude.

24. A coremakers bench or the like having a depressible platen, and means for setting the platen in vibration by depression thereof. i p

25. A coremakers bench or the like having afloating platen. and means for setting the platen in vibration by depression thereof to a predetermined extent, comprising a fluid operated vibrator having a controlling element shiftable by depression of the platen.

26. In a device of the character described, a table. means for supporting a core-box'on said table, a normally inoperative vibratory device for vibrating the core-box, and means whereby a movement of the box will set said vibratory means into operation.

In witness whereof, I have hereunto set my hand on the 22nd day of August, 1919. I

GEORGE B. PICKOP. 

